问题补充:
Chinas reform and opening has been going on for is like about 30 years now and its really quite remarkable.
A. that
B. which
C. what
D. it
答案:
A. that
B. which
(答案→)C. what
D. it
解析:答案:C考查名词性从句。句意:中国的改革开放现在已经进行了大约三十年,效果非常明显。 is like about 30 years now是介词for的宾语,该部分缺少主语,所以选起双重作用的what。